The Internet Archive has a preservation copy of this work in our general collections.
Joseph A. Pollia, Walter C. Alvarez, Frank L. Platt, Ernest D. Chipman, Karl F. Meyer, Robert Burns, Guy S. Millberry, A.F. Lucchetti. "The Removal or Retention of Pulpless Teeth." The Journal of the National Dental Association 7.2 (1920) 175-194